*{
    box-sizing: border-box;
}
body{
    margin: 0;
    width: 100%;
}
.top{
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    z-index: 120;
}
.top-left{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    border-right: 1px solid lightslategray;
}
.top-right{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;

}
.top li{
    margin: 5px 15px;
}
.top li a{
    color: black;
}

.top li a:visited{
    /* color: lightslategray; */
}
li{
    list-style: none;
    margin: 5px;
}

.input li>img{
    width: 160px;
    height: 60px;
}
.input{
    width: 900px;
    margin: 0px auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    z-index: 110;
}
#input{
    width: 450px;
    height: 40px;
}
.input li>button{
    height: 40px;
    font-size: 14px; 
    background-color:  #38f;
    color: white;
    border: none;
}
.input li>a{
    line-height: 50px;
    color: lightslategray;
}
.input .xinwen .dan p{
    margin: 0;
}
.dan{
    display: flex;
    flex-wrap: wrap;
}
.nav{
    /* position: fixed; */
    background-color: #01204f; 
    /* height: 40px; */
    /* z-index: 100; */
      
}
.nav>div{
    margin: 0px;
}
#nav-a{
    width: 1200px;
    margin: 0px auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    color: white;
}
.nav #nav-a a{
    color: white;
    line-height: 50px;
    text-decoration: none;
}
.nav #nav-a li{
    text-align: center;
    margin: 0px 5px; 
    width: 50px;  
     height: 50px;
}
main{
    width: 1200px;
    margin: 0px auto;
    height: 2000px;
}
.color{
    background-color: red;
}
main button{
    width: 50px;
    height: 50px;
    font-size: 40px;
    position: fixed;
    bottom: 50px;
    right: 50px;
    display: none;
}


